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ci: save Rust caches only on pushes, and let releases read CI's image caches #87

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Merged
fylorn merged 1 commit into from
Oct 8, 2026
Merged

ci: save Rust caches only on pushes, and let releases read CI's image caches #87

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9 changes: 9 additions & 0 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,13 @@ jobs:
- uses: dtolnay/rust-toolchain@89b12181fb390509a0842a86cc55eeb8eb928c1d # stable
with:
toolchain: stable
# Save only on pushes (dev, main). A PR can read its own caches, its
# base branch's and the default branch's, never another PR's, so a cache
# saved on a PR serves only a later push to that same PR, while taking as
# much of the repository's 10 GB cache quota as dev's and evicting it.
- uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
with:
save-if: ${{ github.event_name == 'push' }}
- uses: taiki-e/install-action@183e4297cca2404691e9380e1307288dced5c82a # v2.87.25
with:
tool: cargo-nextest
Expand Down Expand Up @@ -158,6 +164,9 @@ jobs:
with:
toolchain: stable
- uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
with:
# See the `rust` job.
save-if: ${{ github.event_name == 'push' }}
- uses: taiki-e/install-action@183e4297cca2404691e9380e1307288dced5c82a # v2.87.25
with:
tool: cargo-nextest
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9 changes: 7 additions & 2 deletions .github/workflows/release.yml
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Expand Up @@ -104,8 +104,13 @@ jobs:
org.opencontainers.image.version=${{ github.ref_name }}
org.opencontainers.image.revision=${{ github.sha }}
org.opencontainers.image.licenses=BUSL-1.1
cache-from: type=gha,scope=${{ matrix.component }}-${{ steps.meta.outputs.platform_pair }}
cache-to: type=gha,scope=${{ matrix.component }}-${{ steps.meta.outputs.platform_pair }},mode=max
# Read the caches CI saves on main, never write. A tag run can read
# its own caches and the default branch's (main) only, and the tag
# points at a commit whose main push CI has just built from the same
# Dockerfile, so these scopes are CI's (`server-<platform>`, and `web`
# for both platforms). A cache written here would be filed under the
# tag, where no later run can read it.
cache-from: type=gha,scope=${{ matrix.component == 'web' && 'web' || format('server-{0}', matrix.platform) }}

- name: Export digest
run: |
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